Surely it's possible that an interested party - perhaps one with the audacity to taint a lasagna or bribe a goalkeeper - might have 'persuaded' them to be as stubborn as possible.
True, enough time wasting might just have taken them over the previous planning permission limit with the council (?), but is that really worth the gamble of large financial loss over legal fees and taking (what I assume would be) a substantially lower CPO payment for the land than by settling beforehand?
Unless, of course, that interested party had promised to cover legal fees, or make sure they're financially sorted no matter what... Would that even be illegal? Genuine question.